An Etymological Dictionary of the German Language/sperren
sperren, vb., ‘to bar, obstruct, fasten,’ from MidHG. and OHG. spęrren (pret. sparte, OHG. sparta), wk. vb., lit. ‘to provide with spars.’ Deriv. of Sparren.
sperren, vb., ‘to bar, obstruct, fasten,’ from MidHG. and OHG. spęrren (pret. sparte, OHG. sparta), wk. vb., lit. ‘to provide with spars.’ Deriv. of Sparren.